Suspension for centrifugal extractors



SUSPENSION FOR CENTRIFUGL EXTRACTORS Fild NOV. 205' 1928 :lov

Patented Mar. 3, '1931 PATENT AopFFlcE MATHIAS HAHN, 0F AACHEN, GERMANY,ASSIGNOR T0 THE FIRM AACHEN, GERMANY oF H. KRANTZ', or

SUSPENSION FOR CENTBIFUGAL I EXTRACTORS Application led November 20,1928, Serial No. 320,726, and in Germany october 25, 1928.

It is common practice in the extractor art to suspend the extractor-sfrom a number of posts, preferably three, equally spaced about theperiphery of the extractor by means of rods attached to the tops of theposts, on the one hand, and to lugs of the extractor tub, on the otherhand. The ends of these rods are generally provided with specialbearings consisting, for instance, of head pieces having spherical orhemispherical surfaces which fit in corresponding seats of the saidposts and tub lugs. As the number of oscillations or swinging movementsof the extractor is very high, especially in high-speed mashines, thehemispherical bearing surfaces are subjected to considerable friction.If the surfaces are not very carefully lubricated, a rapid wea andsometimes even a seizing o f the bea ing surfaces is entailed. In thelatter case the oscillating movement of the extractor is impeded and inconsequence thereof an enormous increase of the strains in thesuspension rods is produced which sometimes leads to breakage of therods.

It is the object of my invention to provide an extractor suspensionwhich does no longer possess the above-said drawbacks. To this end, Ipropose to mount the upper and lower ends of the suspension rodson twosuperimposed blades arranged crosswise with relation to one another. Inthis way, there is obtained a frictionless universal suspension of therods which does not require any lubrication'and attendance.

An embodiment of the invention is illustrated in the accompanyingdrawing, in

which Fig. 1 is a sectional elevation of a por- Y tion of the extractorand its suspension, Fig. 2 is a detail view of one of the double bladebearings on an enlarged scale and Fig. 3 a

similar view seen at a right angle to Fig. 2.

Referrin now to the drawings in detail, a

' is the tub o the extractor and b is the basket which is rotatablysupported in the tub by means of the spindle,l c which is provided at lthe tub. The rods f extend with play through openings a2 in lugs al ofthe tub a and openings g2 in the tops g1 of the posts g. The rods f areprovided at their ends with heads form, for instance, by nuts laArranged between the nuts h, onv the one hand, and the lugs a1 and posttops g1, on the other hand, are two superimposed blades z', k and z'l,k1, respectively. These blades have openings for the free passagetherethrough of the rods f. The axes of the blades ,z'l are situated ata right angle with respect to Ithe axes of the 4blades-lc, k1. The lugsa* and the post tops g1, respectively, form seats Z for the blades z'and il, while the seats m for the blades c and icl are formed by theblades i and 1.

. The described double 'blade bearings constitute universal suspensionsfor the rods f in which there is no friction and which do not requirelubrication. 2

Having thusdescribed my invention, what I claim as new and desire tosecure by Letters-Patent, is

A suspension for centrifugal extractors, comprising in combination aplurality of supporting posts spaced about the' periphery of theextractor, connectingr rods betweenl thel posts and the extractor tubone end of which passes through the posts and the opposite end throughthe tub, a head on each end of the rods, and substantially frictionlessbearings formed between the head at one end ofthe rod and the supportingpost and between the head at the other end of the rod and the tub, saidbearings including relatively crossed blades presenting knife edgecontact, the rodA passing through the blades.

-In testimony whereof I have signed my name to this specification.

. MATHIAS HAHN.

